JPS60248911A - Combustion cylinder - Google Patents

Abstract

PURPOSE:To enable to hold the steady flame shape retention even under oxygen deficient condition by a method wherein the opening area of air holes located lower than air regulating rings on an inner cylinder an an outer cylinder are made larger at the near side than the far side of the air regulating rings. CONSTITUTION:Concerning air holes 2a' located lower than an air regulating ring 7 of an outer flame cylinder 2, the opening area of an air hole 2a'' located nearby the air regulating ring 7 is formed larger than an air hole 2a''' located further lower than the air hole 2a''. Further, concerning air holes 1a' located lower than an air regulating plate 9 of an inner flame cylinder 1, the opening area of an air hole 1a''' located nearby the air regulating plate 9 is formed larger than an air hole 1a''' located further lower than the air hole 1a''. Therefore, in said structure, even though the draft in a space 5 between the inner and outer cylinders is made weaker than normal condition under the oxygen deficient condition, because of the largeness of the air hole 2a'' opening area located nearby the air regulating ring, the air is sufficiently flowed into the space 5 between the inner and outer cylinders in spite of the weak draft as shown by arrow marks. Accordingly, the air is mixed with a kerosene vapor evaporated from a wick B, then the flame shape retention is continued on the air hole 2a''.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a combustion tube for kerosene stoves and the like.

Conventional structure and its problems In general, this type of combustion tube has an inner flame tube 1 and an outer flame tube 2, each having a large number of pores 1a+2ak, and an outer tube that covers the outer lower part of the outer flame tube 2, as shown in FIG. 3 and a heat transmitting tube 4 provided on the upper part of this outer tube 3 so as to cover the outside of the outer flame tube 2? They are arranged concentrically.

As shown in FIG. 4, between the outer cylinder 3 and the heat transmitting cylinder 4, the amount of air flowing into the space 5 between the inner and outer flame cylinders and between the outer flame cylinder 2 and the heat transmitting cylinder 4 is regulated. A regulating ring 7 is provided, and the air holes 2 of the outer flame tube 2 below the air regulating ring 7 are provided.
a' was almost uniformly formed in #M dimension under the outer flame cylinder.

As a result, the oxygen concentration in the room decreases (hereinafter referred to as an oxygen-deficient state).
Then, there was a problem that a large amount (7) of C0 started to be generated.

In other words, under normal conditions other than an oxygen-deficient state, the draft between the inner and outer cylinders 4 is sufficiently higher than the draft 6, and as a result of playing chess, air flowing from the lower part of the outer cylinder 3 flows into the pores 2a' as shown by the broken line arrows. The oil enters between the inner and outer flame cylinders 5, mixes with the petroleum vapor evaporated from the lamp wick 8, forms a flame-holding state in the pores 2a', and continues to burn -mk of the petroleum vapor vaporized from the lamp wick 8. However, when oxygen is deficient, the combustion in the portion between the inner and outer flame cylinders 5 facing the heat transmission cylinder 4 gradually shifts downward and begins to decrease, and the draft becomes extremely weak compared to normal conditions. the result,
The air that was drawn by the draft between the inner and outer flame tubes 5 and flowing as shown by the broken line passes through the gap between the air regulation ring 7 and the outer flame tube 2 through the gap between the air regulation ring 7 and the outer flame tube 2 with less resistance than the air holes 2a', as shown by the solid line arrow. The air starts to rise as shown in FIG. Therefore, the petroleum vapor evaporated from the wick 8 cannot be burned, and the flame retention formed in the pores 2a disappears, causing the wick 8 to burn.
All the petroleum vapor that evaporates from remains as it is without being combusted.
It will rise. Moreover, since the combustion power at the part between the inner and outer flame cylinders 5 facing the heat transmission cylinder 4 is reduced, a part of the oil vapor is released outside the combustion cylinder without being completely combusted, and a large amount of oil vapor is released. CO is generated.

OBJECTS OF THE INVENTION The present invention was made in view of the above-mentioned sterilization point, and aims to reduce CO generation during oxygen deficiency. Among the pores of the outer flame tube located below the air rush regulation ring, the pore opening area of the part near the air regulation ring is made larger, and the part below this is made smaller than the above-mentioned part.

DESCRIPTION OF EXAMPLE The example will be explained below using the first factor and FIG. 2.
The same parts as the conventional example are given the same numbers and the explanation is omitted.
To explain only the different parts, among the pores 2a' of the outer flame tube 2 below the sudden air regulation ring 7, the pores 2a'' in the part closer to the air regulation ring 7 are the pores 2a#/
The opening area is set larger than that of the conventional one. In this embodiment, the air holes 1 are located below the air adjustment plate 9 of the inner flame tube 1.
A/ is also such that the opening area of the pores 1a'' on the side closer to the air adjustment plate 9 is larger than that of the pores 1a□ on the lower side.

Therefore, with this configuration, even if the draft between the inner and outer flame cylinders 5 becomes weaker than normal due to oxygen deficiency,
Since the opening area of the pores 2a'' near the air regulation ring is large, even with the weak draft described above, air flows sufficiently into the space between the inner and outer flame cylinders 5 as shown by the arrow, mixes with petroleum vapor evaporated from the lamp wick 8, and flows into the pores 2a. Continue to form a flame-holding state. In particular, the group of air holes 28'' with a large opening area is provided near the bottom of the blast regulation ring 7, so that the air flowing in from below the outer cylinder 3 hits the air regulation ring 7 and is directed toward the outer flame cylinder 2. With the addition of the effect of changing the temperature, a sufficient amount of air is secured to form a flame-holding state.Therefore, part of the oil vapor that continues to evaporate from the wick 8 is absorbed into this flame-holding area. Since it is combusted, the amount of unburned petroleum vapor that rises as it is is reduced, and the unburned petroleum vapor is almost completely combusted between the inner and outer flame cylinders 5 facing the heat transmitting cylinder 4.

In particular, in this embodiment, the pores 1, 11, 1a'r on the inner flame cylinder side
Since the same consideration is given to the outer flame tube, the above-mentioned action is also performed on the inner flame tube side, and more complete combustion can be expected.

Figure 5 shows the exhaust gas characteristics of the product of this example compared to the conventional product, and it can be seen that compared to the conventional product A, the amount of co generated in the product B of this example is extremely small even at an oxygen concentration of 15%. The pores 2a' near the air regulate the air!
Also, the air hole 1 an near the air adjustment plate of the inner flame cylinder 1 is
The opening area can be increased by increasing the pore diameter on each side of each pore, or by increasing the pore density while keeping the pore diameter the same, and the same effect can be obtained with either method. .

Furthermore, in the combustion tube of this embodiment, the heat transmission tube 4 is placed on and supported by the air rush regulation ring 7, so that no special support member or the like is required, and the structure can be simplified.

Fig. 2 shows another embodiment of the present invention, which differs from the above embodiment in that the air regulation ring 7 is integrally formed with the entire outer cylinder 3, requiring special parts for the air regulation ring. This allows for even greater simplification without having to do this.

Effects of the Invention As described above, the present invention is such that the opening area of the pores of the inner flame tube and the outer flame tube below the air regulation ring is made larger on the side closer to the air regulation ring and smaller on the side below it. Since a stable flame is reliably formed even in the case of oxygen deficiency, the amount of coke generated in the case of oxygen deficiency is extremely small, resulting in high safety.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the main part of a smoking pipe according to an embodiment of the present invention, Fig. 2 is a sectional view of the main part showing an embodiment of the present invention, and Fig. 3 is a sectional view showing a conventional combustion pipe. FIG. 4 is an enlarged sectional view of the same essential parts, and FIG. 5 is a graph showing the exhaust gas characteristics of the product of the present invention and the conventional product. 1... Inner flame tube, 2... Outer flame tube, 3...
...Outer cylinder, 4... Heat transmission cylinder, 7... Air regulation ring, Ia, 1a'1 g+, 1 attt-
+-・Inner flame cylinder pores, 2" + 2 a' 12 a"
+ 2 a”...pores in the outer flame tube. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] (1) An inner flame tube and an outer flame tube having a large number of pores, an outer tube covering the lower outer periphery of the outer flame tube, and an upper outer periphery of the outer flame tube located on the upper part of the outer flame tube. a heat-resistant heat transmitting tube that covers the outer flame tube, and an air regulating ring provided protruding toward the outer flame tube near the joint between the outer flame tube and the heat transmitting tube, and the air regulating ring in the outer flame tube. Among the lower pores, the pore group closer to the air regulation ring has a larger opening area than the other pores. (2) The combustion tube according to claim 1, wherein the outer flame tube has a larger number of air holes directly below the air regulating ring, which are denser than those below. (3) The outer flame tube is a combustion tube according to claim 1, in which the pores directly below the air regulating ring are larger than those below. 4) The combustion tube according to claim 1, wherein the heat transmission tube is placed on and supported by a blast control ring. (5) The combustion cylinder according to Claims 1, 2, and 4, wherein the air regulation ring is integrally formed with the outer cylinder.